package com.sky.service.impl;/**
 * @Package: com.sky.service.impl
 * @ClassName: UserServiceImpl
 * @Author: CY
 * @CreateTime: 2025/7/24 14:45
 * @Description:
 */

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;

/**
 *@author ChenYong
 *@time 2025/7/2414:45
 */
@Slf4j
@Service
public class UserServiceImpl implements UserService {

    private static final String WX_LOGIN_URL = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private WeChatProperties weChatProperties;

    @Autowired
    private UserMapper userMapper;

    @Override
    public User wxLoginOrReg(UserLoginDTO userLoginDTO) {

        String openid = getOpenid(userLoginDTO.getCode());
        //判断openid是否存在，如果为空表示登录失败

         if (openid == null) {
             throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
         }
        //如果openid存在，判断用户是否为新用户，如果是新用户，自动完成注册

        User user = userMapper.getByOpenid(openid);
         if (user == null) {
             user = User.builder()
                     .openid(openid)
                     .createTime(LocalDateTime.now())
                     .build();
             userMapper.insert(user);
         }
        //返回用户对象

        return user;
    }
    private String getOpenid(String code) {

        HashMap<String, String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", code);
        map.put("grant_type", "authorization_code");

        //调用微信登录接口，获取openid
        String json = HttpClientUtil.doGet(WX_LOGIN_URL, map);
        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");

        return openid;
    }
}
